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  1. #1
    Join Date
    Dec 2019
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    amersham
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    Servo vacuum hose

    Fitted my Rover 25 brake servo a while back and now need to connect the vacuum hose to my 350 short block chevy. At present there is a nylon/plastic tube running from the servo and going nowhere. The tube will have to be replaced as its too short to reach any connection on the engine. The question is in the case of a short block chevy where does the tube/hose connect to , presumably somewhere on the intake manifold .
    Any suggestions/recommendations welcome.

  2. #2
    Join Date
    May 2004
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    Cowbridge, United Kingdom
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    62
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    As you suggest the intake manifold on the small block chevy.
    Most manifolds will have several potential outlets.
    look for blanking plugs that can be replaced with a tapping.
    Kev Davies
    South Wales Area Rep. UKCC Membership Secretary
    DAX Mk4, 383 Chevy Stroker, Tremec. SOLD
    Contemporary CCX 3-4028, 445ci Big Block FORD FE,TKO 600, Old School IVA'd and SOLD
    Dax De Dion LS2 and T56 IVA'd June '17 SOLD
    1965 Ford Mustang 289 Convertible SOLD
    In build- Hawk 289 Sebring Awaiting IVA

  3. #3
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    Jan 2003
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    PRESTON, LANCASHIRE, ENGLAND.
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    198
    mine is connected into the back of edelbrock carb

  4. #4
    Join Date
    Jan 2006
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    Chelmsford Essex
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    First check you manifold for allen key plugs for the take off. You need full vacuum so be careful if taking off from the carb. There might be two ports on your carb and the lower one should be full vacuum.
    If your carb or inlet manifold do not have full vacuum you will have to drill and tap a plug hole but I would be very surprised if that was the case.
    Dax 351 Cleveland T5 2.88 PL

  5. #5
    Join Date
    Mar 2008
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    Coventry
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    Same here, back of the carb

    Paul
    AK, on the road Oct 2012

  6. #6
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    Jan 2003
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    PRESTON, LANCASHIRE, ENGLAND.
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    198
    further to previous response what you need is a hose barb fitting to screw into back of carb i think the thread size is 3/8 npt but not 100% sure

  7. #7
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    Dec 2019
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    Thats interesting, i have a quick fuel carburettor , on the back there is a short stub pipe which is about 3/8" dia, as far as i have investigated it would appear that this can be used for the brake booster vacuum hose (ie servo hose). It also is recommended that its best not to tee off any other vacuum connections.

  8. #8
    Join Date
    Mar 2008
    Location
    Coventry
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    2,356
    Quote Originally Posted by methoni View Post
    Thats interesting, i have a quick fuel carburettor , on the back there is a short stub pipe which is about 3/8" dia, as far as i have investigated it would appear that this can be used for the brake booster vacuum hose (ie servo hose). It also is recommended that its best not to tee off any other vacuum connections.
    That's the one I use

    Paul

  9. #9
    Join Date
    Dec 2019
    Location
    amersham
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    152
    I think that confirms it then Paul.
    I will use that connection, just now need to get some vacuum hose from CBS.
    Regards

  10. #10
    Join Date
    Apr 2005
    Location
    Worcestershire
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    2,358
    I think you might need a one way valve too, also, make sure it's secured to something between the carb and the servo (for IVA).
    Regards

    Craig Perry

    No, I'm not "repairing" it, I'm fine tuning its performance.

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